Mitigate the occurrences of 'failed to receive candidate' error

[goshawk-3]

fixes #1438

[codecov-commenter]

Codecov Report

Merging #1439 (6655b9e) into master (828364b) will decrease coverage by 10.27%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1439       +/-   ##
===========================================
- Coverage   50.51%   40.24%   -10.28%     
===========================================
  Files         145      146        +1     
  Lines        7544     9622     +2078     
===========================================
+ Hits         3811     3872       +61     
- Misses       3066     5123     +2057     
+ Partials      667      627       -40     

Impacted Files	Coverage Δ
pkg/core/consensus/testing/node.go	0.00% <0.00%> (-93.55%)	:arrow_down:
...ore/consensus/blockgenerator/candidate/testutil.go	0.00% <0.00%> (-90.91%)	:arrow_down:
pkg/core/consensus/testing/utils.go	0.00% <0.00%> (-75.61%)	:arrow_down:
...core/consensus/blockgenerator/candidate/genesis.go	0.00% <0.00%> (-69.24%)	:arrow_down:
...nsensus/blockgenerator/candidate/blockgenerator.go	0.00% <0.00%> (-64.29%)	:arrow_down:
pkg/gql/query/transactions.go	13.43% <0.00%> (-52.55%)	:arrow_down:
pkg/core/consensus/selection/handler.go	33.33% <0.00%> (-44.93%)	:arrow_down:
pkg/util/nativeutils/eventbus/eventbus.go	57.14% <0.00%> (-42.86%)	:arrow_down:
pkg/rpc/client/session.go	26.19% <0.00%> (-42.39%)	:arrow_down:
pkg/rpc/client/client.go	3.73% <0.00%> (-36.61%)	:arrow_down:
... and 168 more

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