@mh1983 Hard to know why some of your texts are not being received. I know of one instance (only one I was able to confirm) when I didn't receive a text sent to me, perhaps there were others that I'm not aware of.
Here's some other suggestions from chatbot:
Toggle airplane mode on/off.
Manually select PM network on your network settings.
Test your SIM in another phone to rule out an issue with your device.
Of course, make sure the data is enabled on the phones in case it was temporarily turned off?
Otherwise you might need to submit a ticket to customer support unless someone else has a few more troubleshooting tips.