Norton Mobile Security 2.5.0.384 scanning much slower than "usual"

Used to be, NMS would do a routine Anti-Malware scan (without SD card) of 116 total files in 3-4 seconds.  Now, within the past couple weeks, it's scanning the same files in like 25-26 seconds!

 

Any idea why it might now be sooo slow?  Anyone else notice significantly slower regular Anti-Malware scans in the past couple weeks?  Thank you.