Wavetable multi-oscillator tail off clicks

Audio Plugins
1

I have a Synthesizer with more than one oscillator, the tail-off when a key is released produce clicks, following is the renderNextBlock function

    void renderNextBlock(juce::AudioSampleBuffer& outputBuffer, int startSample, int numSamples) override
    {
        if (noteOnFlag) 
        {
            int initialStartSample = startSample;
            int initialNumSamples = numSamples;
            float initialTailOff = tailOff;

            // After Key Off 
            if (tailOff > 0.0) // [7]
            {
                for (auto oscillatorIndex = 0; oscillatorIndex < oscillators.size(); ++oscillatorIndex)
                {
                    initialStartSample = startSample;
                    initialNumSamples = numSamples;
                    initialTailOff = tailOff;

                    while (--initialNumSamples >= 0)
                    {  
                        auto levelSample = oscillators.getUnchecked(oscillatorIndex)->getNextSample() * level * tailOff;
                        for (auto i = outputBuffer.getNumChannels(); --i >= 0;)
                            outputBuffer.addSample(i, initialStartSample, levelSample);
                        tailOff -= 0.001;
                        if (tailOff <= 0.0)
                        {
                            noteOnFlag = false;
                            break;
                        }
                        ++initialStartSample;

                    }
                    
                }
                if (tailOff <= 0)
                {
                    clearCurrentNote();
                    resetIndex();
                }

            }
            // After Key On
            else
            {
                for (auto oscillatorIndex = 0; oscillatorIndex < oscillators.size(); ++oscillatorIndex)
                {
                    initialStartSample = startSample;
                    initialNumSamples = numSamples;
                    while (--initialNumSamples >= 0)
                    {
                        auto levelSample = oscillators.getUnchecked(oscillatorIndex)->getNextSample() * level;

                        for (auto i = outputBuffer.getNumChannels(); --i >= 0;)
                            outputBuffer.addSample(i, initialStartSample, levelSample);
                        ++initialStartSample;
                    }

                }

            }

        }
       
    }
    

    private:
        int counter = 0;
        const unsigned int tableSize = 1 << 7;
        float level = 0.0f, tailOff = 0.0f;
        bool killQuick = false;
        bool noteOnFlag = false;
        juce::AudioSampleBuffer sineTable;
        juce::OwnedArray<WavetableOscillator> oscillators;
};

An image of the tail off

image