obscure warning lme4 using lmer in optwrap

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Using lmer I get the following warning:

Warning messages:
1: In optwrap(optimizer, devfun, x@theta, lower = x@lower) :
  convergence code 3 from bobyqa: bobyqa -- a trust region step failed to reduce q

This error ois generated after using anova(model1, model2) . I tried to make this reproducible but if I dput the data and try again I the error does not reproduce on the dput data, despite the original and new datarames have the exact same str.

If have tried again in a clean session, and the error reproduces, and again is lost with a dput

I know I am not giving people much to work with here, like i said I would love to reproduce the problem. Cayone shed light on this warning?

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