2013 Guild F512 12 string finish cracks

[ScaryLarry]

I have a 2013 Guild F512 12-string guitar that I purchased new, and have kept it at a 70 degree / 45% humidity environment since then.

When changing strings, I noticed a slight finish crack just to the left of the bridge, and a longer one on the right front of the bridge to the bottom of the pick guard.

I am obviously concerned that they may get larger, and worried that it may be an indication of future top cracking.

I did try using extra light strings (.009s) for about a year but decided that it sounds much better with the original .010s. This got me wondering if by using the lighter strings, the tension on the top was different, and perhaps caused the slight cracks.

I would appreciate any input.

Regards,
SLarry