I just did a quick test here using RHEL7 and EPICS Base R3.15.5 and my output looks normal...
slepicka@ioc-tst-12 ~ $ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.3 (Maipo)
slepicka@ioc-tst-12 ~ $ caget TST:IOC:FLIR:01:MEM_MAX
TST:IOC:FLIR:01:MEM_MAX 1.67902e+10
slepicka@ioc-tst-12 ~ $ caget -F '|' TST:IOC:FLIR:01:MEM_MAX
TST:IOC:FLIR:01:MEM_MAX|1.67902e+10
slepicka@ioc-tst-12 ~ $ caget -F '' TST:IOC:FLIR:01:MEM_MAX
TST:IOC:FLIR:01:MEM_MAX1.67902e+10
slepicka@ioc-tst-12 ~ $ caget -F '$' TST:IOC:FLIR:01:MEM_MAX
TST:IOC:FLIR:01:MEM_MAX$1.67902e+10
slepicka@ioc-tst-12 ~ $ caget -F '$$$' TST:IOC:FLIR:01:MEM_MAX
TST:IOC:FLIR:01:MEM_MAX$1.67902e+10
slepicka@ioc-tst-12 ~ $ caget TST:IOC:FLIR:01:MEM_MAX
TST:IOC:FLIR:01:MEM_MAX 1.67902e+10
Cheers,