Special Fonts Causing Slow Down

Same issue with me, I'm just adding captions for a video podcast and my client wants me to use their branded fonts. The variable fonts makes it worse, the playback doesn't show any videos anymore.

I'm using i5-7600 and its iGPU with 32GB ram. This issue isn't apparent when I use Adobe fonts.

update: every time I add a new font, it goes back to it's laggy slow state

I delete the contents of the media cache, media cache files and peak files folders, empty the trash, then re-open premiere, and the problem is fixed, but everytime I add a new font the cycle repeats

Hi Kevin!

Thank you for getting back to me; 

So, my project has numerous special fonts, animations and overlays.

I was able to solve the lag issue by deleting all of my media cache files (going into finder, deleting all files in under Library/Application Support/Adobe/Common/Media Cache, Media Cache Files and Peak Files)

However, this only solves the problem for about 20 minutes or so, before Premiere starts lagging up again. Then I quit it, delete all the files, and reopen Premiere. So I do have a solution, but I would love to find something more long-term, as it's quite annoying to have to quit out of Premiere every 20 minutes/every time I decide to play the project back from the beginning.

I've attached screenshots of a framegrab from the video (so you can see all the different elements), as well as of the timeline, so you can see the complexity of the project. It's a lyric video, so the bottom track is the main video, everything else is animations and text. Each word spoken in the song has a different text element and animation. 

In the frame grab, there are 4 different green screen videos overlayed on top of each other, 4 different text elements, as well as some png images being animated, and the text has effects on it as well. So maybe I am just pushing the limits of Premiere, but this seems odd to me as professional level editing surely involves way more elements... 

Looking forward to hearing back,

April