I am running this mod on my home server (manually installed RL Craft 2.9.2d) and am able to get the GUI glitched out quite easily. I have altered the config file, so I show that below so that you can recreate this issue. I have also attached photos of the glitches. One thing to note is that it seems as though all three of the visual glitches are related. Perhaps if you fix one, they'll all be fixed! It is also very likely that there is some mod from RL Craft 2.9.2d that is somehow interfering with this mod, so I'm sorry if I wasn't smart enough to figure that out. Anyways, thanks for giving this a look!

--Glitch 1-------------------------------------------------------------------------------------------------------------------------------------
The composter arrow fills up and does not reset after successfully composting. The arrow simply remains full and will not reset until the composter is completely emptied manually.

--Glitch 2-------------------------------------------------------------------------------------------------------------------------------------
The entire composter GUI will eventually "wrap" or duplicate itself to the right. Just in case this has anything to do with my resolution, this screenshot was captured on a 2560x1440p monitor.

--Glitch 3-------------------------------------------------------------------------------------------------------------------------------------
Eventually, glitch 2 will disappear (after about 80 successful composts) but the arrow in the GUI will become empty and remain empty.

--Config File-----------------------------------------------------------------------------------------------------------------------------------
As promised, here is the config file with the exact changes I made when I collected the above screenshots,