SMS disappearing

[fiSh]

This may not be a Tasker problem but ... I have two profiles that catch SMS messages; one for people in my contacts and another for people not in my contacts. The tasks just says who the text is from without speaking the body (just i case the wrong people are present). I have noticed that every once in a while (no obvious pattern yet) I'm told that a message has arrived but then cannot find it on my phone, and no notification appears. I have inserted a logging call (my own) which records all the SMS variables. This does show the full content (which as a spin off means I get the message!). I also run pushbullet which should echo any notification to my PC (but of course might be part of the problem). I have a Samsung Galaxy S6 running Android 6.0.1 and Tasker 4.8u5m. Anybody any ideas?