AdSense & Google maps not playing together?

Hi all.

Late last month I added Google maps to a ‘toy’ site. Page layout looks good both in Dev & Prod.

I’ve noticed since then that my AdSense Click-throughs have dropped to zero. My Page impressions per day are generally unchanged. Page eCPM has dropped from a $3/$4 range to near zero.

I’m wondering if AdSense & Google maps are playing together well or not? Has anyone see or heard of a problem like this. Has Google made any policy changes in the second half on January?

Any help would be much appreciated.