apple watch has stopped letting me access messages

Apologies if this has been covered, I'm hoping I'm not the only one experiencing this.
Lately, I have been unable to read my messages on my watch, I go into messages, and its like the watch is stuck on "messages"and won't read either a list or message content. if I'm lucky enough to click and open one, I can read the message but when I go back again, same deal, just "messages"
I have turned the watch off and turned it back on, and it gives me a list of messages, but then after awhile its behaviour reverts to the initial problem. any ideas? thanks