We probably need to see abit more code and some sample data. However, as a stupid suggestion, is there any chance that when you take the log of the variable one datum may be being evaluated as zero?
A minimal reproducible example consists of the following items:
A minimal dataset, necessary to reproduce the issue
The minimal runnable code necessary to reproduce the issue, which can be run
on the given dataset, and including the necessary information on the used packages.
Let's quickly go over each one of these with examples: