Have you performed an update?
In terminal..
sudo apt update
sudo apt upgrade -y
then reboot.
There may be an issue with Chrome and the app needs to be updated..
Also check for cooling issues. What is the CPU temp rising to? Maybe the finals are getting weak and drawing more power? Hos is your power supply - is it between 13-14 volts? What is the current draw on the power supply during transmit?
FWIW - I am still running a 2GB Pi on my sBitx 64bit and it works fine - no crashes at all. It will get sluggish over time especially using VNC and a bunch of apps. The trick I use is to close the sBitx app, then restart the VNC connection to speed it up when things get slow..
What logging app are you using?
-JJ
