[Bug] Fix validation interface data race #3487

Job	Run time
lint	54s
CMake-Linux	19m 16s
Native-x64-Linux	47m 31s
Depends-ARM 32-bit	1m 35s
CMake-Linux-latest	17m 15s
Native-x64-Linux-latest	42m 57s
Depends-AARCH64	1m 34s
CMake-macOS	12m 23s
Native-x64-macOS	18m 55s
Depends-Win64	1m 42s
Native-x64-macOS-latest	1h 18m 17s
CMake-macOS-latest	26m 12s
Depends-32-bit + dash	1m 30s
Depends-x86_64 Linux	2m 14s
Depends-macOS 10.12	1m 39s
ARM 32-bit [GOAL:install] [no unit or functional tests]	18m 59s
AARCH64 [GOAL:install] [no unit or functional tests]	18m 46s
Win64 [GOAL:deploy] [no unit or functional tests]	20m 56s
x86_64 Linux [GOAL:install]	45m 13s
x86_64 Linux [GOAL:install] [no GUI, no unit tests, only functional tests on legacy pre-HD wallets]	23m 58s
macOS 10.12 [GOAL:deploy] [no unit or functional tests]	15m 43s
	6h 57m 29s

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