Hey, magenta2169336, welcome! Missing messages is always a bummer -- especially when most of us rely primarily on messaging to communicate these days. When this happens, are you connected to Wi-Fi or the network -- and if the latter, how many bars do you have? Is this a T-Mobile Nexus 6, or one purchased from Google directly (asking for the purpose of understanding whether your existing APNs came preset or were manually entered)?
Marissa and MC
Thanks for your response. Yes, I am still interested in any solutions to this problem.
I purchased my Nexus 6 from T-Mobile. I generally have 2 to 3 bars of service. I have WiFi at home, but WiFi calling is not enabled on my phone. I have mostly been home the last 2.5 months. I never entered APN data manually. When I first turned on the new phone, it said it was downloading some customization that I thought came from T-Mobile, but I could be wrong. There was some APN data problem that messed up texting maybe 1.5 years ago due to some errant update by Google, but that was fixed within a week or so.
I would be glad to check my APN data if you could point me to the correct data.