This is really dangerous. 
The reason why you aren’t getting anything with blob picks but are with templates is that at the frequency cutoffs you are using, you are picking high-frequency noise.
Using templates is fine, but you need to make sure you get rid of any high frequency information - low pass filter to 20 (default) or even 30 A. Make sure both mics and templates are filtered >20 A.
Please show a low pass filtered (12A, more tends to blow out the mic in CryoSPARC) version of the micrograph you posted above, as there is something between the two ice smears, but it looks rather broken and might just be JPEG artefacts combined with a little wishful thinking on my part… 