HM01B0 images are funky after reinitializing without power cycle

When the HM01B0 is initialized after a power cycle, the images look fine. If the HM01B0 is re-initialized without a power cycle (eg. from a soft reboot triggering boot.py to run again), then the images can sometimes become funky. It looks like the exposure settings or something got messed with?

Regardless, should look into why `soft_reset()` is failing to fix it.