Reading the CRC values occasionally fails

Every fourth CRC reading from hardware fails. See the following log from adaptation.

setup roi roicount: 4
add region: 0 id: 139780313
add region: 1 id: 174249564
add region: 2 id: 41111189
add region: 3 id: 62048029
READ read ROI roi count: 4
Set CRC: 139780313 0 3975076789 valid: 1
Set CRC: 174249564 1 402835355 valid: 1
Set CRC: 41111189 2 490687410 valid: 1
Set CRC: 62048029 3 1341290203 valid: 1
setup roi roicount: 4
add region: 0 id: 174312805
add region: 1 id: 174271904
add region: 2 id: 108941076
add region: 3 id: 64263165
READ read ROI roi count: 4
Set CRC: 174312805 0 2137044818 valid: 1
Set CRC: 174271904 1 1269682793 valid: 1
Set CRC: 108941076 2 3734968661 valid: 1
Set CRC: 64263165 3 1851710582 valid: 1
setup roi roicount: 4
add region: 0 id: 485515
add region: 1 id: 80525468
add region: 2 id: 147638645
add region: 3 id: 7049413
READ read ROI roi count: 4
Set CRC: 485515 0 43432308 valid: 1
Set CRC: 80525468 1 2850595948 valid: 1
Set CRC: 147638645 2 1793839109 valid: 1
Set CRC: 7049413 3 2024980781 valid: 1
setup roi roicount: 4
add region: 0 id: 7049413
add region: 1 id: 41111189
add region: 2 id: 62048029
add region: 3 id: 80525468
READ read ROI roi count: 4
*Set CRC: 7049413 0 43432308 valid: 0
Set CRC: 41111189 1 2850595948 valid: 0
Set CRC: 62048029 2 1793839109 valid: 0
Set CRC: 80525468 3 2024980781 valid: 0*