A/B testing in Stream, Is BOT activity driving statistically unremarkable results?

This question references my previous question on BOT activity

We are engaging in some A/B testing of our marketing emails that are in an engagement stream, as one should.  I choose "new test" 50/50 with champion and challenger.  Up to now we have only done subject line tests.  I have tried 'Click to open %' and 'Custom Conversion Ratio' (clicking on one specific link in that email), but all results are within a couple clicks of 50/50. 

This week we tried whole emails, and STILL the results are 50/50

I am starting to get the feeling that BOT activity is driving these A/B test results.  In the previous question linked above, we had found out that a large amount of our clicks were coming from the first link in the TEXT ONLY version, suspecting BOT activity.  A recent email:

Do you have any ideas on how to filter out BOT clicks for A/B testing?

Thanks.