Internal USB-C port cable coming unseated after replacement

I have a small human with a massive fidget impulse, and seem to be caught in a loop where I need to replace the USB-C port on his iPad every six months. It would be nice if Apple decided to make repairable devices, but that doesn't seem to be coming any time soon. So I've gotten reasonably proficient at this repair, and have even gotten a heat pad for warming glue to make it easier to take off the screen, along with a bag of 10 USB-C port replacements. This has worked reasonably well until this week. Now I get the new port successfully installed, seated and reglued to the iPad. I confirm it's working by charging the device and even unplug/replug the USB-C cable three to four times and wiggle it around a fair bit to confirm it's all in place securely. Then it works for about 6-10 hours and then stops charging again. If I open it back up again and re-seat the charging port internal cable connection (step 30 on iPad Pro 11インチ 1st Gen USB-Cポートの交換) it will charge just fine again, for about a day or half day. I've tried swapping out the port for a new one - and am now on my third replacement port I've checked the port on the iPad to see if there are any unhappy or bent pins and can't see any that look amiss, and indeed when I reinstall it seats and does two satisfying if quiet clicks for each side of the little port. I'm wondering if anyone has had better luck keeping these down - should I try to add adhesive somewhere else (I'm not sure where this woudl possibly by)? Am at a bit of a loss and definitely can't get caught in a death loop of repairing this port every 24 hours. Any advice most welcome!