MCR cache seems always out of date

I'm running on windows 10 a compiled toy executable, and it always re-extracts its embedded ctf file to the MCR cache. I defined the MCR_VERBOSE environment variable, and am seeing output like this:

D:\temp\Matlab>SayMyName.exe "Say my name"

D:\temp\Matlab>Creating MATLAB Runtime Cache at location: D:\MCR_CACHE\mcrCache9.0.1
.max_size found... contents read. Cache max size set to 33554432
MATLAB Runtime cache extracting component: SayMyName_42C6733E6B46BBA1E03A94D932F887F7
Acquiring MATLAB Runtime cache root-level directory lock... acquire succeeded.
Reading cache index file...
Read cache index entry:
SayMyName_42C6733E6B46BBA1E03A94D932F887F7
SayMyN0
195472
2017-Mar-29 14:51:03.668665

Finished reading cache index file.
MATLAB Runtime cache: extractDir is D:\MCR_CACHE\mcrCache9.0.1\SayMyN0
Checking for creation timestamp...
Timestamp is valid.
Acquiring component-level directory READ lock...
 acquire succeeded.
Component SayMyName_42C6733E6B46BBA1E03A94D932F887F7 has successfully been accessed from the cache.
MATLAB Runtime Cache: performing maintenance...
Processing cached components...
Done with cache maintenance.
Checking whether index file D:\MCR_CACHE\mcrCache9.0.1\.mcr_cache_index needs to be written...
Write is needed.
Writing cache index file: D:\MCR_CACHE\mcrCache9.0.1\.mcr_cache_index
Writing cache index entry:
SayMyName_42C6733E6B46BBA1E03A94D932F887F7
SayMyN0
195472
2017-Mar-29 14:51:17.877599

Heisenberg

Note the lines - Checking whether index file D:\MCR_CACHE\mcrCache9.0.1\.mcr_cache_index needs to be written... Write is needed.

The cache index timestamp ( 2017-Mar-29 14:51:03.668665 in the above) is exactly 3 hours earlier than my computer time. And this is the only thing that is actually updated in the cache.

Any idea what might be causing this?

[John Ioannidis]

does anyone from Mathworks ever read this forum? Lots and lots of questions that should have trivial answers go unanaswered.