MIT App Inventor not transferring info to AI Companion on phones

I am teaching an APCSP class using AI (via Chrome) on Dell PC laptops running Windows 11. Students and myself are using the companion app on our phones. Most of the class are using iPhones while some, including myself, are using some sore of Android.

When we connect to our apps in AI using QR codes or directly typing in a code, most of the time they connect but either never transfers over the information or gets stuck around 42%. I have tried to connect to my students' apps with my phone, which sometimes works, but more often than not lately, it doesn't work. When it does transfer, there are always issues - pictures as buttons not showing.

I tried clearing my cache on my two week old ThinkPad laptop as was mentioned somewhere else. No luck. Everything is up to date and the laptops and phones are on the same wifi.