Weird syntax highlighting behavior in 'custom syntax support'

[serg3295]

When replacing the function name with the plugin.lua script the replacement is performed correctly, but part of the function name is highlighted in a different color.

Screenshots

luaSrvErr3.mp4

Environment (please complete the following information):

• OS: Windows
• Is WSL remote? no
• Client: VSCode

plugin.lua

function OnSetText(uri, text)
  local diffs = {}
  local textAny = text:sub(1, 2)
  diffs[#diffs+1] = {
        start  = 1,
        finish = 2,
        text   = (textAny),
  }

  for displTypePos, finish in text:gmatch '[%w_]+%s*%=%s*ucg%.()[%w_]+_hw_spi()' do
    diffs[#diffs+1] = {
        start  = displTypePos,
        finish = finish - 1,
        text   = ('ucgDisplayType'),
    }
  end

  for displTypePos, finish in text:gmatch '[%w_]+%s*%=%s*u8g2%.()[%w]+_i2c_[%w_]+()' do
    diffs[#diffs+1] = {
        start  = displTypePos,
        finish = finish - 1,
        text   = ('u8g2DisplayTypeI2C'),
    }
  end

  for displTypePos, finish in text:gmatch '[%w_]+%s*%=%s*u8g2%.()[%w]+_[^i][%w_]+()' do
    diffs[#diffs+1] = {
        start  = displTypePos,
        finish = finish - 1,
        text   = ('u8g2DisplayTypeSPI'),
    }
  end

   return diffs
end

[serg3295]

Everything works fine. Thanks a lot!