2017 EZGO RXV lock up

I have a 2017 ezgo rxv that will occasionally lock the brake while driving. I usually get it unlocked in a couple of minutes. The issue started when I had lead acid batteries and had the dealer look at it when I switched to lithium. The error codes came back to the solenoid so we replaced that. I had about 8 months of no issues and now it’s locking up randomly again. Any suggestions on what could be going on?

Thanks!