Cannot process Float Or Integer number

[xuto2]

I'm getting the below error with fluentd 1.16.3 when using this plugin:

2024-02-15 07:47:12 +0000 [warn]: #0 dump an error event: error_class=NoMethodError error="undefined method =~' for 1707983231.364:Float" location="/usr/lib/ruby/gems/3.2.0/gems/fluent-plugin-string-scrub-1.0.1/lib/fluent/plugin/filter_string_scrub.rb:51:in with_scrub'" tag="kube.var.log.containers..log" time=2024-02-15 07:47:11.364141563 +0000 record={"log"=>"{"level":"info","ts":1707983231.364,

2024-02-15 07:47:12 +0000 [warn]: #0 dump an error event: error_class=NoMethodError error="undefined method =~' for 1707983231:Integer" location="/usr/lib/ruby/gems/3.2.0/gems/fluentd-1.16.3/lib/fluent/time.rb:126:in method_missing'" tag="fluent.warn" time=2024-02-15 07:47:12.353006815 +0000 record={"error"=>"#<NoMethodError: undefined method =~' for 1707983231.372:Float>", "location"=>"/usr/lib/ruby/gems/3.2.0/gems/fluent-plugin-string-scrub-1.0.1/lib/fluent/plugin/filter_string_scrub.rb:51:in with_scrub'", "tag"=>"kube.var.log.containers..log", "time"=>2024-02-15 07:47:11.372172259 +0000, "record"=>{"log"=>"{"level":"info","ts":1707983231.372,

But from the code it seems that it can work with Integer.

def recv_record(record)
scrubbed = {}
record.each do |k,v|
if v.instance_of? Hash
scrubbed[with_scrub(k)] = recv_record(v)
elsif v.instance_of? Integer
scrubbed[k] = v
else
scrubbed[with_scrub(k)] = with_scrub(v)
end
end
scrubbed
end