Yes, I'm still working with Gaia on this. The crashing stopped with 7.0.5, but the sync is still not working.
For those following my saga, the sync issue was only solved by uninstalling Gaia from my Galaxy Tab A, and then reinstalling it. Many other things were tried as Gaia attempted to fix my sync issues, but I had to use the nuclear option. Sync works well now. But by uninstalling the app, I lost all of my map downloads. Gaia has been very responsive to my emails through all of this! And while going through these issues I recently subscribed to 5 more years of GaiaGPS premium.
My ongoing issue at the moment is the very, very slow download of maps, when putting them on the microsd card. By slow, I mean that it takes a couple days for one map that is near the size limit. This a big deal, since I overland with a motor vehicle, so I need a ton of maps for every trip. I download at zoom level 14, which is a barely acceptable level of detail, so that isn't the problem.
For those that might ask, I recently purchased a Galaxy S8 phone, and it has the same super slow download when the maps are stored on the MicroSD card. It's pretty quick when using the device's internal memory, but there isn't enough space on my S8 or my Tab A for all the maps I need. I'm leaving in just 7 days for 4 weeks on the road, and I hope all the maps I need will be downloaded. I'm talking about only 15 GB more to download, and yes, it is that slow to put the data onto the card, it is not a WiFi issue.