# G4 Plugin lag when two files are open **URL:** \ **Category:** Glyphs\ **Created:** [September 18, 2026, 8:02am UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301 "2026-09-18T08:02:35Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![knikola](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/knikola/32/4343_2.png) [@knikola](https://forum.glyphsapp.com/u/knikola)\ **Post date:** [September 18, 2026, 8:02am UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301/1 "2026-09-18T08:02:35Z")
Hi everyone, I’ve noticed that a significant lag appears in the _Show Stem Thickness_ plugin when I open two files in G4. When only one file is open everything runs smooth. As soon as I open another file the _Show Stem Thickness_ starts freezing. Then I have to restart G4 and while I work in only one file everything is OK again. ---
**Author:** ![GeorgSeifert](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/georgseifert/32/259_2.png) [@GeorgSeifert](https://forum.glyphsapp.com/u/GeorgSeifert)\ **Post date:** [September 19, 2026, 9:51am UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301/2 "2026-09-19T09:51:01Z")
I can’t reproduce this. What version of Glyphs and the plugin do you have? ---
**Author:** ![knikola](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/knikola/32/4343_2.png) [@knikola](https://forum.glyphsapp.com/u/knikola)\ **Post date:** [September 19, 2026, 4:34pm UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301/3 "2026-09-19T16:34:34Z")
I’m on the latest build (4108) and the plugin is installed through the Plugin Manager, so I guess it’s the latest version? I also have _Show Angled Handles_, _Show Kinks_ and _KernOn_ installed. ---
**Author:** ![GeorgSeifert](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/georgseifert/32/259_2.png) [@GeorgSeifert](https://forum.glyphsapp.com/u/GeorgSeifert)\ **Post date:** [September 20, 2026, 4:51pm UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301/4 "2026-09-20T16:51:01Z")
Can you try to remove all other plugins and see if that changes things? ---
**Author:** ![knikola](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/knikola/32/4343_2.png) [@knikola](https://forum.glyphsapp.com/u/knikola)\ **Post date:** [September 21, 2026, 8:08am UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301/5 "2026-09-21T08:08:39Z")
OK, after removing all three plugins and re-installing and testing them one by one, the lag problem seems to be gone. ---
**Author:** ![GeorgSeifert](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/georgseifert/32/259_2.png) [@GeorgSeifert](https://forum.glyphsapp.com/u/GeorgSeifert)\ **Post date:** [September 21, 2026, 4:39pm UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301/6 "2026-09-21T16:39:28Z")
So you have installed the same plugins now and it is better now? Maybe one of the plugins was updated and you didn’t have the update, yet? ---
**Author:** ![knikola](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/knikola/32/4343_2.png) [@knikola](https://forum.glyphsapp.com/u/knikola)\ **Post date:** [September 21, 2026, 5:02pm UTC](https://forum.glyphsapp.com/t/g4-plugin-lag-when-two-files-are-open/37301/7 "2026-09-21T17:02:42Z")
> [@GeorgSeifert](#): > > So you have installed the same plugins now and it is better now? Yes. > [@GeorgSeifert](#): > > Maybe one of the plugins was updated and you didn’t have the update, yet? They were originally all installed via the Plugin Manager — that should keep them always updated? And the lag was present since I installed G4 like a month ago. Today I noticed that the _Show Stem Thickness_ disappeared after I “woke up” the computer to continue working, so I had to restart the app to get it running ok again.