Hi! This is my first post in the forum.

I noticed after updating to Office 365 on a W10 machine, I'm using the same 90k record .xlsb file I've always used, but now if I filter by a column where filter options are more than excel can show in the filter menu, Excel uses 100% of my i7 processor for like 30 seconds, and completely slow down Excel to a crawl if I Click on it with my mouse, but if I use my Keyboard and Alt+Down it works just perfect. This is super annoying, and so specific I haven't been able to find a solution for it anywhere.

My system specs:
Windows 10 64bit
i7 256SSD 16GB RAM
Office 365 ProPlus Version 1803 (Build 9126.2315 Click-to-run)

Appreciate the help